Mercury(II) sulfide (HgS) exists in two different crystalline forms. In cinnabar, the band gap is 3.2 × 10¬19 J; in meta- cinnabar, it is 2.6 × 10-19 J. In some old paintings with improperly formulated paints, the pigment vermilion (cin- nabar) has transformed to metacinnabar on exposure to light. Describe the color change that results.

Q: What type of semiconductor is prepared by doping As into Si? A) p-type B) n-type C) intrinsic D)…

A: A semiconductor is a solid substance that possesses conductivity in the range between an insulator…

Q: The electronic structure of a doped semiconductor is shown here.  1.)Is this an example of an…

A: Semiconductors can be defined as the materials whose conductivity lie between metals and insulators.

Q: Define the following:(i) F-centre (ii) p-type semiconductor(iii) Ferrimagnetism.

A: (i) In crystals, there exists some defects one of which is anion vacancy defect, an F-center is…

Q: The atomic packing factor of a metal is 0.74. The density of the material is 8.97 g/cm and A = 58.69…

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Q: The band gap for the elemental semiconductor silicon is 1.11 eV. That energy corresponds to what…

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Q: Define these properties and explain the relationship of IMF strength to each property. (a) Boiling…

A: (a) Boiling point Boiling point is the point where a matter changes its state from liquid to gas.…

Q: Choose the options that would form a p-type semiconductor.  Choose all that would make a p-type…

A: When a trivalent element impurity (less valent) dopped with tetravalent (or more valent)…

Q: Briefly describe the significance of anion gap?

A: We have to tell the significance of anion gap.

Q: GaP and GaAs are both used in LED (light-emitting diode) applications. i.The bandgap of GaP is 2.26…

A: We have the basic formula, Energy(∆E) = hcλ Here, given, Energy = 2.26 eV (GaP) and 1.43 eV (GaAs)

Q: A sample of an alkali metal that has a BCC unit cell is found to have a mass of 1.000 g and a volume…

A: Given : Mass of alkali metal = 1 g Volume of alkali metal = 1.0298 cm3 Volume of hydrogen = 539.29…

Q: Iron titanate, FeTiO3, forms in the ilmenite crystal structure that consists of an HCP arrangement…

A: (a)The formula unit of iron titanate can be written as FeO TiO2.Calculating the cation-to-anion…

Q: Calculate the mass density of diamond assuming that it is a close-packed structure of hard spheres…

A: a) Radius of close packed hard sphere is Mass of diamond is 12.01 g/mol. Considering close-packed…

Q: Electron mobility, He 0.720 m²/(V. s) Hole mobility, µHn 0.020 m²/(V.s) Intrinsic carrier…

A: The answer to the following question is-

Q: Indicate if each solid forms an n-type or a p-type semiconductor.a. silicon doped with galliumb.…

A: a.

Q: Classify each of the following as a conductor, insulator, or semiconductor: (a) phosphorus; (b)…

A: The given element has to be classified as conductor, insulator, or semiconductor.

Q: There are four different types of band structures at 0 K. Among them, two are typified in metals,…

A: The solution is given below -

Q: Which substance has the greatest band gap?a) silicon b) germaniumc) lead d) gold

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Q: The number of electrons excited to the conduction band per cubic centimeter in a semiconductor can…

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Q: How many molecular orbitals are present in the conduction band of a lithium crystal with a mass of…

A: Any conduction band is formed by the overlap of two molecular orbitals. Hence, the number of…

Q: Which of the following elements, if doped into silicon, would yield an n-type semiconductor: Ga, As,…

A: N-type semiconductors are conductors that are formed by doping (process of adding impurity atoms to…

Q: In NaCl, the cations are more mobile than the anions. What effect, if any, do you expect small…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: The element osmium has hcp packing with a hexagonal unit cell. The volume of the unit cell is 2.80 x…

A: The Hexagonal closed packing is defined as the two-dimensional closed packing between the unit cells…

Q: What type of semiconductor is prepared by doping Ga into Si? A) p-type B) n-type C) intrinsic D)…

A:

Q: Which element produces a p-type semiconductor when doped into silicon?

A: Semiconductors are the materials that have a conductivity that lies between the conductors and…

Q: Sodium metal with a bcc structure has two atoms per unit cell. The radius of the sodium atom is 1.85…

A: Mean free time = me/q2np  Here,  me is the effective mass of the conduction electrons  =…

Q: Which of the following doped semiconductors will be p-type and which will be n-type (i)Arsenic in…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Describe the caesium-chloride and rock-salt structures. How does the radius-ratio rule help in the…

A: The below is the structure of cesium chloride.

Q: In terms of band theory, what is the difference(i) between a conductor and a semiconductor?(ii)…

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Q: Indicate if each solid forms an n-type or a p-type semiconductor.a. germanium doped with galliumb.…

A: In the periodic table: Germanium belong to IVA group. So it has four valence electrons. Gallium…

Q: Estimate at what temperature silicon tends to be as electrically conductive as diamond at room…

A: The solution is provided in the image below.

Q: Cinnabar (HgS) was utilized as a pigment known as vermillion.It has a band gap of 2.20 eV near room…

A: Given , Band gap  = 2.20 eV           If E is the corresponding photon energy then,…

Q: Classify each of the following as a conductor, insulator, or semiconductor: (a) carbon (graphite);…

A: Conductors are those that allow the charge to pass through them while insulators don't allow the…

Q: The compound MX has a density of 2.1 g/cm^3 and a cubic unit cell with a lattice parameter of 0.57…

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Q: For the hcp (hexagonal close packed) structure, the  c/a ratio (height of the unit cell divided by…

A: Given: the  c/a ratio (height of the unit cell divided by its edge length) =1.633. To Calculate: The…

Q: The unit cell of an intermetallic compound consists of a face-centered cube that has an atom of…

A: The unis shell of the face-centered cube has an atom of element X at each corner and an atom of…

Q: Which type of semiconductor (e.g., n-type or p-type) is each of the following systems likely to be?…

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Q: A substance has a band gap of 0.85 eV at 273 K. Is this substance best classified as an insulator, a…

A:

Q: What type of semiconductor is obtained when silicon is doped with arsenic?

A: Silicon belongs to group 14. It has atomic number 14 and has 4 valence e-. Arsenic belongs to group…

Q: Would each of the following form an n-type or a p-type semiconductor: (a) Ge doped with As; (b) Si…

A: (a) Ge doped with As :  n-type semiconductor will be formed.  (Arsenic is electron rich impurity.)…

Q: 4. Compare and contrast SC, BCC, FCC and HCP in terms of coordination number, number of atoms per…

A:

Q: Aluminum (atomic mass 26.98g/mol) crystallizes in a face centered cubicunit cell. In addition,…

A: Given: Atomic mass of aluminium= 26.98 g/mol Atomic radius= 143.2 pm= 0.143 nm

Q: Is gallium-doped germanium a p-type or n-type semiconductor?

A: Gallium-doped germanium is a p-type semiconductor.

Q: Tungsten (W) has a body centered cubic lattice with a unit cell edge length of 3.165 A. What is the…

A:

Q: Describe the efficiency, in general, of copolymerisation and plasticisation in lowering melting…

A: A copolymer is also known as polymer and when two or more than two monomer combined as result…

Q: Does a photon of red light with a frequency of 4.29 * 10  14 Hz have sufficient energy to promote an…

A:

Q: For each of the following pairs of semiconductors, whichone will have the larger band gap: (a) CdS…

A: Since the band gap is directly proportional to the electronegativity difference  Hence more the…

Q: How does the band gap differ in metals, semiconductors, andinsulators?

A: Band gap is the energy gap between conduction band and valence band. In metals, the band gap between…